Strainer box



Aug. 1, 1939. w MORSE 2,168,039

STRAINER BOX Filed Jan. 10, 1938 INVENTOR. James. W Morse. Y B 6%,%

AT ORNEY Patented Aug. 1, 1939 UNITED STATES STRAINER BOX James W. Morse, Lansing, Mich., assignor to Food Machinery C'orporation, San Jose, Calif., a cor-.

poration of Delaware Application January 10, 1938, Serial No. 184,287

1 Claim.

My invention relates to strainer boxes for the tanks of spray rigs and the like of the type commonly employed in spraying insecticide on trees, vines, and other plants, where it is desirable to strain the liquid at the time the tank is being filled to prevent the entry of deleterious matter into the tank.

It is a general object of the invention to provide an improved strainer box for the tanks of spray rigs or the like.

Another object of the invention is to provide an improved strainer box of the character referred to which embodies screening means which can be readily assembled in the box or replaced when necessary.

Other objects will appear from the following description of a preferred embodiment of the invention, taken in connection with the drawing showing a perspective view of a strainer box which is partly broken away to illustrate details of its construction.

Spray rigs of the character referred to customarily include a removable strainer box in the filling opening of the liquid tank so that any harmful matter cannot enter the tank when it is being filled with liquid. As spray liquids are usually of a more or less corrosive material, it is highly desirable that the box be acid resistant insofar as possible and also be constructed to allow easy replacement of the screen element which is usually of metal.

The strainer box of my invention comprises mating top and bottom portions which are removably secured together and between which the 5 screening element is clamped in place. Preferably, the screening surface is made in corrugated or saw-tooth form to provide a larger screening area and to prevent clogging of the screen by material strained from the liquid, and

the mating edges of the box portions are preferably formed so that a fiat screen will be shaped in corrugated fashion as it is assembled between the box portions.

The strainer box comprises a frame open at the top and bottom and which includes upper portion I having side walls 2 and end walls 3 suitably joined at the corners by a tongue and groove means 4 and by other suitable fastening means such as glue or screws, as desired. Around the top of the walls 2 and 3, flange strips 5 are suitably secured to the walls 2 and 3 by fastening screws with their mitred ends connected by suitable dowels 6. The flange strips provide a projecting ledge to engage the wall of the tank when the strainer box is placed in the filling opening therein, as well as to receive a suitable cover. 5 The bottom portion 1 of the strainer box includes side walls 8 and end strips 9 which are suitably secured together in the same manner as the walls 2 and 3 of the upper frame portion, to provide an open frame of the same outline.

The various portions of the box described thus far are preferably made of wood or similar acid resistant material, and the side Walls 2 and 8 are preferably provided with mating lower and upper edges Ill and II, respectively. The edges l0 and 15 I l are of sinuous or corrugated outline and may be formed by sawing the two wall pieces from the same plank. Between the mating edges I0 and l I,

a metallic screen I2 of suitable mesh is clamped by suitable fastening screws l3, which extend up- 20 wardly through the bottom portion of the box, and through the screen into engagement with the top box portion. In assembly the flat screen is placed between the upper and lower box portions so as to be formed in the corrugated fashion 25 shown as the mating edges thereof are moved into cooperative relation.

From the above description, it will be seen that I have provided a simple, sturdy strainer box of advantageous construction which can be econom- 30 ically manufactured, and which enables easy replacement of the strainer screen.

While I have shown and described a preferred embodiment of the invention, it will be understood that the invention is capable of variation and 35 modification from the form shown, so that the scope thereof should be limited only by the scope of the claim appended hereto.

I claim:

A strainer box for a spray rig tank or the like, 40 comprising a pair of box-like frame portions having mating edges, opposite sets of said edges being similarly corrugated, a strainer extending across said box with its edges positioned between said mating edges, and means releasably securing said 5 frame portions together with said strainer clamped between said mating edges, whereby the operation of assembling said frame portions forms said strainer into a corrugated shape.

JAMES W. MORSE. 

